Here are some specialty cakes that I have done here and there for a couple meetups I have gone to and some I have just made to take to work:
Thin Mint cake: A chocolate cake with a crushed thin mint filling and a mint buttercream topped with ganache and more crushed thin mints.
Peanut Butter Ganache Cake: Chocolate cake with a peanut butter filling and peanut butter frosting topped with chocolate ganache.
Strawberry Ganache Cake: A vanilla cake with a homemade strawberry jam filling, vanilla buttercream topped with chocolate ganache and sliced strawberries.
Oreo mini cake: Vanilla cake with crushed oreos in the batter, an oreo filling and oreo buttercream topped with split oreos.
Cherry cake: A vanilla cake with a whipped ganache filling topped with chocolate covered cherries and covered in a vanilla bean buttercream.